FILE PHOTO: A protester falls after being hit by a water cannon fired by riot police, as others take cover behind a makeshift shelter, during clashes at Taksim Square in Istanbul, Turkey, June 11, 2013. Riot police fired tear gas and water cannon at hundreds of protesters armed with rocks and fireworks as they tried to take back control of a central Istanbul square at the heart of fierce anti-government demonstrations. REUTERS/Yannis Behrakis/File photo SEARCH "YANNIS BEHRAKIS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

FILE PHOTO: A protester falls after being hit by a water cannon fired by riot police, as others take cover behind a makeshift shelter, during clashes at Taksim Square in Istanbul, Turkey, June 11, 2013. Riot police fired tear gas and water cannon at hundreds of protesters armed with rocks and fireworks as they tried to take back control of a central Istanbul square at the heart of fierce anti-government demonstrations. REUTERS/Yannis Behrakis/File photo SEARCH "YANNIS BEHRAKIS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.